Glad I found you, this is the best explanation for finding out this hidden side to capacitors and why it matters on unmarked components I have come across. I have subscribed and will now watch all your videos. I do hope you manage to keep this channel going even if it is infrequently, there may be lot's of electronic channels but you have a way of explaining things in a very understandable manner which is much appreciated by me and others too. 💐🤔♥️🧀🐈⬛😼🌈🏳️⚧️🏳️🌈🇮🇱🇵🇸🇺🇦🇪🇺💐
Thank you for your comment! Yes, of course, I'll explain the settings. Use 5ms as the timebase setting, this is ideal for measuring the 50Hz or 60Hz interference that you couple into your capacitor. Use a 1x probe and a low Volts/div setting to get as much signal as possible. Something between 2mV and 20mV is a good choice. Try what works best for your setup and your capacitors. If your scope has a bandwidth limitation, use it to get rid of RF noise, you just want to see the 50Hz or 60Hz interference. You can use an analog or digital oscilloscope for these measurements.
I am glad, that you have enjoyed my video! You always should locate the low impedance side of the caps, also non-polar ones. The coupling of the interference does not depend on whether the cap is non-polar or polar. However, there might be some circuits in which it is more important than in others since it depends on which impedances the cap is facing and what it is doing in the circuit. So the safest way is to always make sure you get the low impedance side correct.
@@rondeldebbio9219 For example , if you restore a guitar amp and add all new caps in it , the foil side always goes to ground , if not then you get more hum in your amp .... Usually the caps that are changed will be electrolytic style and those are marked from the factory..... The orange drops and Mallory caps are not marked ...... The cathode caps that go to ground are an example ..... Remember always that a capacitor is a filter for noise and other things but that's getting a lil deeper into it...... Those bigger caps near the power transformer are filters also for 60 Hz hum in the USA , non USA is 50 Hz ......
New to electronics. Why arnt caps marked with the outer foil side? It should be the industry standard. What standards UL, ASTM, ISO, DIN... can be created and established, and thriugh whom? boggles them mind why there is no standard.!
Most vintage caps head the outer foil side marked. The reason why modern caps don't have markings anymore is that it's not necessary for modern circuits. In modern electronic circuits that are made of transistors and ICs, you have much lower impedances and smaller components than in circuits with tubes. Since the impedance is lower and the components are smaller it's mostly not necessary to know the outer foil side in modern circuit designs.
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This is the best explanation and demonstration I have seen about finding the shield/foil side of capacitors. Thank you very much for sharing.
Glad I found you, this is the best explanation for finding out this hidden side to capacitors and why it matters on unmarked components I have come across. I have subscribed and will now watch all your videos. I do hope you manage to keep this channel going even if it is infrequently, there may be lot's of electronic channels but you have a way of explaining things in a very understandable manner which is much appreciated by me and others too. 💐🤔♥️🧀🐈⬛😼🌈🏳️⚧️🏳️🌈🇮🇱🇵🇸🇺🇦🇪🇺💐
Thank you. This is very helpful, as my main interest is tube guitar amps. 😊❤️
Really great explanation thank you. I think we should not trust a marked outer foil end, test them all when its critical is a good approach
Thank you so much!
Thanks for the useful video
Thank you for that comment! I am happy to hear that it was useful for you.
Love your explanation! Could you explain all of your scope settings as they are set to check for outside foil end of the caps?
Thank you for your comment! Yes, of course, I'll explain the settings. Use 5ms as the timebase setting, this is ideal for measuring the 50Hz or 60Hz interference that you couple into your capacitor. Use a 1x probe and a low Volts/div setting to get as much signal as possible. Something between 2mV and 20mV is a good choice. Try what works best for your setup and your capacitors. If your scope has a bandwidth limitation, use it to get rid of RF noise, you just want to see the 50Hz or 60Hz interference. You can use an analog or digital oscilloscope for these measurements.
@@MrVideoTronix Thank you for that info. You do a great job explaining things.
@@chrisr.3122 Thank you! I enjoy explaining things 🙂
Very helpful!
I am happy to hear that it was helpful for you. 🙂
Recently picked up a it-28 seems to be working ok but have not opened. Looks brand new hopefully previous owner has already recaped
I want all your solder!
Excellent! Do you need to locate the low impedance side of non polar caps or can they be connected either way? Thanks again.
I am glad, that you have enjoyed my video!
You always should locate the low impedance side of the caps, also non-polar ones. The coupling of the interference does not depend on whether the cap is non-polar or polar.
However, there might be some circuits in which it is more important than in others since it depends on which impedances the cap is facing and what it is doing in the circuit. So the safest way is to always make sure you get the low impedance side correct.
@@MrVideoTronix Wow, that's great to know and very few know about this. Thanks.
@@rondeldebbio9219 You're welcome!
@@rondeldebbio9219 For example , if you restore a guitar amp and add all new caps in it , the foil side always goes to ground , if not then you get more hum in your amp .... Usually the caps that are changed will be electrolytic style and those are marked from the factory..... The orange drops and Mallory caps are not marked ...... The cathode caps that go to ground are an example ..... Remember always that a capacitor is a filter for noise and other things but that's getting a lil deeper into it...... Those bigger caps near the power transformer are filters also for 60 Hz hum in the USA , non USA is 50 Hz ......
NoScopeNoFun can't I also use a HiZ AC milliVoltmeter? I know it's less fun....but....
What about an inductor...?
This method does not work so well with modern "fat" film capacitors maybe because of the thickness.
New to electronics. Why arnt caps marked with the outer foil side? It should be the industry standard. What standards UL, ASTM, ISO, DIN... can be created and established, and thriugh whom? boggles them mind why there is no standard.!
Most vintage caps head the outer foil side marked. The reason why modern caps don't have markings anymore is that it's not necessary for modern circuits. In modern electronic circuits that are made of transistors and ICs, you have much lower impedances and smaller components than in circuits with tubes. Since the impedance is lower and the components are smaller it's mostly not necessary to know the outer foil side in modern circuit designs.
why dont the chinese mark the outer foil side... duuuh